Lustrum (noun) (literary)
A period of five years.
Late 16th century: from Latin, originally denoting a purificatory sacrifice after a quinquennial census.
“She’s been my friend for eight lustrums now and forty years is a long time!”
Gerundive (noun) (grammar)
A form of a Latin verb, ending in -ndus (declinable) and functioning as an adjective meaning ‘that should or must be done’.
Middle English (in the sense ‘gerund’): from late Latin gerundivus (modus) ‘gerundive (mood)’, from gerundium (see gerund).
(of a place or state) ideal or idyllic; heavenly.
From paradise. Middle English: from Old French paradis, via ecclesiastical Latin from Greek paradeisos ‘royal (enclosed) park’, from Avestan pairidaēza ‘enclosure, park’.